1157 Incadscent to LED Wiring Instructions

[John1397]

TL;DR Summary

How to wire correctly?

On older cars made in the 60's I believe flashers work as I drew it out but dropping resistors sold on Amazon are 6 ohm and it states that they go in parallel not to ground seems to me if you was going from high current draw incandescent bulbs to low draw LED one would put one resistor from lamp positive terminal to ground. Why do I think this it is because when the lamp in back does not burn only front one burns but does not flash seems you need more load to make a flasher work. I also think rather than put one resistor on right and another on left just put one resistor from flasher to ground.

 

[jim mcnamara]

We want to help you - this why we are here. But you have meet us halfway. I cannot understand what you wrote. I could guess I suppose. Please rewrite this question, Then post it in a new question. You can and paste into a new question, then edit to fix the question(s).

The first sentence for example - It really seems to me to be one convoluted sentence that may actually be several sentences. Thanks for understanding.

 

[AlexTheParticle]

I have some experience with this and I can offer some insight. The reason for using a dropping resistor in parallel is to mimic the load of the incandescent bulbs. LED bulbs have a much lower current draw, so the flasher unit may not recognize the load and will not flash properly. By adding a resistor in parallel, it increases the load and allows the flasher unit to work as intended.

As for your suggestion of putting the resistor from the flasher to ground, this could work but it may not be the most efficient way to do it. By placing the resistor in parallel with the bulbs, it allows the current to flow through the bulbs and the resistor, creating the necessary load. If the resistor is placed in series, it may not have the same effect.

I hope this helps clarify the use of dropping resistors in older cars. It may seem counterintuitive, but it is necessary to ensure proper functioning of the flasher unit.